libcruft-util/random.cpp

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/*
* This file is part of libgim.
*
* libgim is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
*
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* Copyright 2010 Danny Robson <danny@nerdcruft.net>
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*/
#include "random.hpp"
#include "range.hpp"
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#include <type_traits>
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using namespace util;
namespace util {
template <typename T>
T
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random (void) {
static_assert (std::is_integral<T>::value, "random should only operate on integral types");
return range<T>::UNLIMITED.random ();
}
template <>
double
random (void)
{ return range<double>::UNIT.random (); }
template <>
float
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random (void)
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{ return range<float>::UNIT.random (); }
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template <>
bool
random (void)
{ return rand () & 0x01; }
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template <typename T>
T&
randomise (T &val)
{ return val = util::random<T> (); }
}
template double util::random (void);
template float util::random (void);
template uint64_t util::random (void);
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template uint32_t util::random (void);
template uint16_t util::random (void);